I am trying to pick out a flexplate for my internal balance 383 with built 4l60e. I am not sure what is the correct one to get. I know its a 153 tooth, internal balance, but unsure of the converter bolt pattern. Is the LT1 4l60e converter bolt pattern the same as a th350? Also, which ARP converter bolts do I use? Thanks for any input!

 

ttt

 

Try this sight and scroll past the PI torque converter, it will show you a picture of the TCI flexplate, and give the appropriate part number:

http://www.thunderracing.com/index.c...ategoryid=1081

SteveC

 

Thats for LS1. The 4l60e for the LS1 is different than the LT1. Thunder Racing is one of the first places I looked. For some reason they do not list a flexplate for LT1.

 

I just received a new SFI approved 153 tooth flex plate from Jeg's for my '94 z28 w/ a high performance 4L60E. It's externally balanced (which is supposed to be the same as oem) and is the right unit according to my engine builder. This will go in a 383 (externally balanced) that's in progress. I believe you need a neutrally balanced flex plate if your 383 is internally balanced. I did not find an internally balanced flex plate when doing my search. Not sure about bolt pattern for a TH350 being the same and the ARP bolts. Hope this helps!